<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
    <meta charset="UTF-8">
    <title>Hello</title>
</head>
<body> 
<h1>随机数:${hello }${string }</h1>
<a href="/clear">清除缓存</a>
</body>
</html>